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GENERAL INFORMATION
1.17.2 GENERAL
VALUES
TORQUES
The following table shows tightening torques for screws
and bolts with metric ISO threads, as is used in this
vehicle. These are general values to be used if no
specific value is given in this manual or other aprilia
service literature.
Screw or
bolt
Wrench
thread
M 6
10
M 8
12
M 10
14
M 12
17
M 14
19
M 16
22
For specific fasteners, see 2.41 (FASTENERS). If not
otherwise indicated, the tightening torques shown should
be used for clean and dry threads, at room temperature.
NOTE
To avoid damage to the threads, tighten screws
and bolts as follows:
Run up the fasteners finger tight.
Applying half the prescribed tightening torque, tighten
the fasteners that are diametrically opposite each
other: (A) and (B); (C) and (D).
Repeat, applying the prescribed tightening torque.
NOTE
In this way the pressure exerted by the fasteners
will be uniformly distributed across the joint surface.
Steel/aluminum
fastening
coefficent of elasticity:
Screw
M4
M5
M6
M8
M10
M12
1
- 36 -
00
OF
TIGHTENING
Tightening torque
ftlb
Nm
4.34
6
10.84
15
21.70
30
39.79
55
61.49
85
94.03
130
screw
with
similar
ftlb
Nm
2.2
3
4.4
6
8.7
12
18
25
36
50
58
80
C
A
D
RST mille
USA
B
Release 00/2002 - 03
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